Correlations between Gun-Barrels Temperature Rising and Shooting Specifications

Shan, Yong; Nie, Zheng; Shan, Shi Qi; Tan, Li Dong

doi:10.4028/www.scientific.net/amm.775.115

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conclusions are confirmed by the analysis of the test results with the use of energy parameters of fatigue. In summary, there are very limited studies on the LCF behavior of Cr-Mo-V steel at 700 • C. Moreover, the literature [8,9] reported that the inner bore surface temperature of the gun barrel can reach approximately 600-700 • C when the gun was shooting. Therefore, it is necessary to study the fatigue performance of gun steels at 700 • C.…”

Section: Introductionmentioning

confidence: 99%

Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C

Zhao

Zhang

et al. 2020

Materials

View full text Add to dashboard Cite

As a newly developed gun barrel steel, the novel steel has shown excellent high-temperature strength, high resistance to wear and erosion, contributing to the superior ballistic life of gun barrels. As ballistic life increases, the fatigue life becomes essential for the safety and reliability of gun barrels. This paper presents a comparison of the low cycle fatigue (LCF) behaviors between a novel steel and 30SiMn2MoV steel at 700 °C. A strain-controlled fatigue test was carried out on the novel steel and 30SiMn2MoV steel in the strain range from 0.2 to 0.6%. The cyclic stress response behaviors of the novel steel and 30SiMn2MoV steel show cyclic softening behavior. In addition, the shape of the hysteresis rings of the novel steel and 30SiMn2MoV steel exhibit no-Masing model behavior. Energy–life relationships results show that the novel steel has higher fatigue resistance than the 30SiMn2MoV steel at 700 °C. The results of fatigue fracture analysis show that the failure mode of the 30SiMn2MoV steel is a mixed mode of intergranular fracture and transgranular fracture, while the failure mode of the novel steel is intergranular fracture. The cyclic softening of the two materials can be attributed to the lath structure with a high density of dislocations gradually transforms into low energy subcrystalline and cellular structures at 700 °C. The novel steel has a better fatigue life than the 30SiMn2MoV steel at 700 °C and different strain amplitudes, which is mainly related to the carbides and lath martensite in the materials.

show abstract

Section: Introductionmentioning

confidence: 99%